"Sister Act" is a musical comedy that tells the story of Deloris Van Cartier, a nightclub singer who witnesses a crime. To protect her, the police hide her in a convent, where she must disguise herself as a nun. Deloris struggles to fit in with the strict and traditional lifestyle of the nuns, but she soon discovers her passion for music can help the choir become more vibrant and lively. As Deloris transforms the choir, she brings joy and excitement to the convent, while also facing challenges from the Mother Superior and the outside world. The story highlights themes of friendship, faith, and the power of music, making it a heartwarming and entertaining experience.